The only British species that has pale patches on the first tergite. Those paired pale patches continue on tergites 2 to 5 (or 8 in the female). Claws simple. Antennal segment 8 less than 3 times as long as broad.
Larval food plant is unknown but thought to be meadowsweet.
Size: Approx. 4 - 6mm
Distribution: England, Scotland, Wales, Ireland
Flight period: May
Plant associations: Unknown, probably Filipendula ulmaria (meadowsweet)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168. https://doi.org/10.3897/BDJ.2.e1168